Supramolecular graphene oxide-alkylamine hybrid materials: variation of dispersibility and improvement of thermal stability

Zhang, Shupeng; Song, Haiou

doi:10.1039/c2nj40214a

Cited by 48 publications

(48 citation statements)

References 49 publications

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“…This showed an improvement in thermal stability and decelerated degradation rate, which is possibility due to interaction of grafted alkylamine and GO surfaces. 17 The thermal stability of functionalised-GO increased substantially below 400°C with increasing chain length of grafted alkylamine. Figure 3(b) showed DTG thermograms of the samples.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

“…It also showed small peak around 3.14 and 3.28 ppm which corresponding to H peak of (-NH) which supports the reaction of alkylamine with GO. 12,17,18 Figure 4:…”

Section: Nuclear Magnetic Resonance (Nmr)mentioning

confidence: 99%

“…The band at 1717 and 1060 cm -1 corresponding to carboxyl and epoxide were weakened after functionalised and a new peak at 1082 cm -1 (C-N) appears, indicating the formation of C-NH-C bands. 17 Generally, γ-ray irradiation method illustrating the simultaneous functionalisation and slightly reduction on GO. 25,26,27,28 A certain decrease in the intensity of the bands at ~1717, 1625 and 1060 cm -1 could be related to the evolution of water or labile oxygen chemical groups duringγ-ray irradiation as reported by Anson et al 29 Figure 2: FTIR spectra of (a) GO and functionalised-GOs and (b) ODA (octadecylamine).…”

Section: Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

“…14,16,17,18 Therefore, a novel route that combines the economic benefits and convenience of chemical synthesis with possessing high reduction efficiency, has been an import target for the preparation of functionalised-GO. Recently, gamma-ray (γ-ray) irradiation has attracted attention among researchers in promising not only environmental friendly method, but also feasible, cost effective and can be perform in room temperature as well.…”

Section: Introductionmentioning

confidence: 99%

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2017

JES

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

“…It also showed small peak around 3.14 and 3.28 ppm which corresponding to H peak of (-NH) which supports the reaction of alkylamine with GO. 12,17,18 Figure 4:…”

Section: Nuclear Magnetic Resonance (Nmr)mentioning

confidence: 99%

Section: Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2017

JES

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“…On the other hand, high-molecular weight oligomeric intercalants are seldom used for GO functionalization. ODA functionalized GO has been successfully dispersed in polyethylene glycol oligomer of 4000 DA, and the obtained nanocomposites showed markedly improved properties [29]. Unfortunately PEG is water soluble and incompatible with nonpolar polypropylene.…”

mentioning

confidence: 99%

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Wang

Jc²,

Sz³

2014

Express Polym. Lett.

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Conductive polymer composites have aroused wide interests from both academia and industry in the field of functional materials. Addition of diverse conducting fillers such as carbon black [1,2], graphite [3], and metal fiber or powder [4] into thermoplastic polymers through melt mixing is an effective approach to fabricate conductive composites. Because a great amount of the fillers, generally greater than 15 wt% [5], were required for the host polymer to become conductive, resulting in both poor processability and inferior mechanical properties, the practical applications of these conventional composites were largely restricted. On the other hand, commercial exploitation of isotactic polypropylene has been expanded rapidly due to its attractive characters of low cost, low weight, heat distortion above 100°C, and extraordinary versatility in terms of properties, applications and recycling. The introduction of nanoscopic fillers of high anisotropy enhances a wide range of performance of the polypropylene nanocomposites, such as mechanical, thermal and conductive properties, at a relatively small loading [6]. Graphite is a layered mineral composed of weakly bonded graphene sheets with a large aspect ratio. Abstract. Various surfactants of different molecular weights, including alkylamine, poly(oxypropylene) diamine (POP), and maleic anhydride grafted polypropylene (PPgMA) oligomers, were used for simultaneous funtionalization and reduction of graphite oxide (fGO). In this study, the effect of molecular weight and compatibility of the surfactants on the morphology and properties of the nanocomposites are reported. Wide-angle X-ray diffraction (WAXD) exhibited a definite interlayer thickness for GOA (alkylamine intercalated GO), however, the diffraction peaks were nearly suppressed for fGOs combining ODA with either POP (GOAP) or PPgMA (GOAE). The uniform dispersion of the fGO flakes in the polypropylene matrix resulted in the significant increase in both the degradation temperature and the crystallization temperature. A single characteristic melting peak of monoclinic (!) crystalline phase was observed from DSC traces, which was consistent with WAXD results. Dynamic mechanical analysis clearly indicated increase in both the storage modulus and the glass transition temperature of the nanocomposites due to the enhanced affinity between fGO and the polypropylene matrix. However, GOAP composite showed lower E" and T g than GOAE because POP is less compatible with the matrix than PPgMA oligomer. Dielectric analysis also showed significant increase in both dielectric permittivity and dielectric loss at low frequency regimes with GOAE showing maximum dielectric properties. The finely dispersed GOAE and its compatibility with polymer matrix manifested the interfacial polarization, which gave rise to much greater #" and #$ than other nanocomposites.

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Preparation and properties of octadecylamine modified graphene oxide/styrene‐butadiene rubber composites through an improved melt compounding method

Wang

Liu

Wang

et al. 2015

J of Applied Polymer Sci

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Octadecylamine modified graphene oxide/styrene-butadiene rubber (GO-ODA/SBR) composites are prepared by a novel and environmental-friendly method called "Improved melt compounding". A GO-ODA/ethanol paste mixture is prepared firstly, and then blended with SBR by melt compounding. GO-ODA sheets are uniformly dispersed in SBR as confirmed by scanning electron microscope, transmission electron microscopy, and X-ray diffraction. The interfacial interaction between GO-ODA and SBR is weaker than that between GO and SBR, which is proved by equilibrium swelling test and dynamic mechanical analysis. GO-ODA/SBR show more pronounced "Payne effect" than GO/SBR composites, indicating enhanced filler networks resulted from the modification of GO with ODA. GO-ODA/SBR composite has higher tensile strength and elongation at break than SBR and GO/SBR composite. The tensile strength and elongation at break for the composite with 5 parts GO-ODA per hundred parts of rubber increase by 208% and 172% versus neat SBR, respectively.

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Supramolecular graphene oxide-alkylamine hybrid materials: variation of dispersibility and improvement of thermal stability

Cited by 48 publications

References 49 publications

Untitled

Untitled

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Preparation and properties of octadecylamine modified graphene oxide/styrene‐butadiene rubber composites through an improved melt compounding method

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